Triangle read by rows of Legendre-Stirling numbers of the first kind.

Terms

a(0) =1a(1) =1a(2) =0a(3) =1a(4) =-2a(5) =0a(6) =1a(7) =-8a(8) =12a(9) =0a(10) =1a(11) =-20a(12) =108a(13) =-144a(14) =0a(15) =1a(16) =-40a(17) =508a(18) =-2304a(19) =2880a(20) =0a(21) =1a(22) =-70a(23) =1708a(24) =-17544a(25) =72000a(26) =-86400a(27) =0a(28) =1a(29) =-112